\n"; $strSuggestion = $strOptional = $strRating = $strJibberish = $strForename = $strAge = $strEmail = ""; if ($_POST) { if (isset($_POST['suggestion'])) $strSuggestion = $_POST["suggestion"]; if (isset($_POST['optemail'])) $strOptional = $_POST["optemail"]; if (isset($_POST['rating'])) $strRating = $_POST["rating"]; if (isset($_POST['jibberish'])) $strJibberish = $_POST["jibberish"]; if (isset($_POST['forename'])) $strForename = $_POST["forename"]; if (isset($_POST['age'])) $strAge = $_POST["age"]; if (isset($_POST['email'])) $strEmail = $_POST["email"]; if (isset($_POST['signup']) && strlen($_POST["signup"]) > 0) { $bSubmitted = true; if (strlen($strForename) < 2 || is_numeric($strForename)) { $iErrorCount++; $strError .= "
  • Please enter your forename
    • \n"; } if (!is_numeric($strAge)) { $iErrorCount++; $strError .= "
  • Please enter your age
    • \n"; } if (!preg_match("/^[\w\-\.\']{1,}\@([\da-zA-Z\-]{1,}\.){1,}[\da-zA-Z\-]{2,}$/", $strEmail)) { $iErrorCount++; $strError .= "
  • Please enter your email address
    • \n"; } } else if (strlen($_POST["submit"]) > 0) { $bRegion = 1; $bSubmitted = true; if (strlen($strSuggestion) < 2 || is_numeric($strSuggestion)) { $iErrorCount++; $strError .= "
  • Enter a suggestion
    • \n"; } if (strlen($strOptional) > 0 && !preg_match("/^[\w\-\.\']{1,}\@([\da-zA-Z\-]{1,}\.){1,}[\da-zA-Z\-]{2,}$/", $strOptional)) { $iErrorCount++; $strError .= "
  • Please enter your email address (optional)
    • \n"; } if (!is_numeric($strRating)) { $iErrorCount++; $strError .= "
  • Please rate this suggestion
    • \n"; } } $strError .= "\n"; if ($iErrorCount > 0) $strError = "

    $iErrorCount Errors in Submission

    \n" . $strError; } ?> Form Validation

    Form Validation

    The following form is validated before being submitted if scripting is available, otherwise the form is validated on the server. All fields are required, except those marked optional. If errors are found in the submission, the form is cancelled and a list of errors is displayed at the top of the form.

    The source code for this example (zip) is available.

     

    Successful Submission

    When it comes to filling out web forms, you rock!

    0 && $bRegion == 0) echo $strError; if ($bSubmitted == false || ($bSubmitted == true && $iErrorCount != 0)) { ?>

    Please enter your details below.

    Validating Form

    Personal Details
    0 && $bRegion == 1) echo $strError; if ($bSubmitted == false || ($bSubmitted == true && $iErrorCount != 0)) { ?>

    Second Form

    Second Form Details